Whether you are a developer comparing two versions of code, a writer reviewing edits to an article, a lawyer checking contract revisions, or a student comparing essay drafts — knowing exactly what changed between two texts is essential. Our free Text Diff Checker highlights every addition and deletion instantly, in both split view and unified view, with no login required.
What Is a Text Diff Checker?
A text diff checker (also called a text comparison tool or diff tool) takes two pieces of text and identifies every line that differs between them. Lines that were added in the new version appear in green with a plus sign. Lines that were removed from the original appear in red with a minus sign. Lines that are identical in both versions appear in grey. This is the same approach used by tools like Git diff, WinMerge, and Beyond Compare — now available in your browser for free.
How to Use the Text Diff Checker
- Open the Text Diff Checker
- Paste your original text in the left box
- Paste your modified text in the right box
- Click Compare Texts
- Green lines show additions, red lines show removals
- Switch between Split View and Unified View using the tabs
Split View vs Unified View
Our tool offers two display modes. Split View shows the original and modified text side by side — ideal for long documents where you want to see context around each change. Unified View shows a single stream of text with additions and removals interleaved — the same format used by git diff on the command line. Both views show line numbers for easy reference.
Common Use Cases
- Code review — Compare two versions of a script, config file, or snippet without Git
- Document editing — See exactly what an editor changed in your article or report
- Legal documents — Spot every change between two versions of a contract or agreement
- Academic work — Compare essay drafts to track revisions and improvements
- Data validation — Compare two CSV or JSON outputs to find discrepancies
- Translation checking — Verify that only intended changes were made during localisation
Compare Your Texts Now
Open the free Text Diff Checker, paste your two texts, and see every difference highlighted instantly. No sign-up, no file upload, no data sent to any server.
